feat(audit): cold-storage archival to S3 (Phase 4)

Final piece of the audit work. Events older than the hot retention window move to S3-compatible object storage with signed manifests. Production uses Hetzner Object Storage; dev uses a MinIO container with the same API. Infra (infrastructure/docker-compose): - New `minio` service exposing the S3 API at minio:9000 + admin console at minio.dezky.local. Healthchecked. Bucket-init sidecar runs `mc mb` once to create `dezky-audit`; safe to re-run. - .env adds MINIO_ROOT_USER + MINIO_ROOT_PASSWORD. - platform-api env: AUDIT_COLD_{ENDPOINT,REGION,BUCKET,ACCESS_KEY,SECRET_KEY} + AUDIT_HOT_RETENTION_DAYS=90 + ARCHIVE_ENABLED=false (dormant in dev; operator UI's "Run archive now" bypasses this gate). AUDIT_COLD_SSE opts into SSE-S3 — left unset in dev because MinIO without a KMS rejects AES256 PUTs with "KMS is not configured". Platform-api (services/platform-api/src/cold/): - cold-storage.client.ts: thin @aws-sdk/client-s3 wrapper — put/head/list. forcePathStyle=true so MinIO and Hetzner both work; same code, env-swap. - archive.service.ts: runOnce() selects chained events with at < cutoff → serializes to JSONL → gzip → sha256s → uploads JSONL + signed manifest → HEAD-confirms both objects exist → records an ArchiveBatch doc → only then deletes from hot Mongo. Crash-safe: a failed upload leaves events in hot. Manifest uses the Phase 3 AUDIT_SIGNING_KEY (HMAC-SHA-256), so archives + checkpoints share trust chain. Bypassable via { override: true } for the operator's UI force-run. - archive.worker.ts: hourly tick guarded by configured run-hour-UTC (default 03:00) + day-guard so the same UTC day doesn't archive twice. Disabled until ARCHIVE_ENABLED=true. - archive-batch.schema.ts: { archivedAt, startSeq, endSeq, eventCount, manifestSha256, jsonlKey, manifestKey, bytesUncompressed }. The manifest sha256 stored in Mongo lets us detect manifest tampering without downloading the actual manifest. Audit module additions: - audit.controller.ts: GET /audit/archives, POST /audit/archive/run, /audit/verify now reports { oldestHotSeq, highestArchivedSeq } so the UI shows the tier boundary. Operator UI (apps/operator): - 2 new proxies: /api/audit/archives + /api/audit/archive/run (force override=true). Both behind operator auth via the existing platformApi helper. - audit.vue: new "Cold storage" card with batch table (archived-at, seq range, event count, size, truncated manifest sha256), "Run archive now" button + per-run result line. Smoke-tested end-to-end: - 7 chained events in hot. /api/audit/archive/run → ok=true, batchId returned. JSONL + manifest both exist in MinIO (verified via mc ls + mc cat). Mongo's chained set went 7 → 0. Verify reports highestArchivedSeq=1446 (since we burn-allocate seqs on Authentik dup-key rejections). Operator /audit panel shows the batch with manifest hash 1d8263… - First attempt with SSE-S3 enabled failed cleanly (MinIO KMS not configured) — archive service correctly left events in hot Mongo. Made SSE opt-in via AUDIT_COLD_SSE=true; prod turns it on. Out of scope (each could be its own session): - Restore-to-hot endpoint (today: download from S3 + offline query) - Client-side encryption (today: SSE-S3 in prod, none in dev) - Multi-region replication - Soft TTL safety net (defense-in-depth on top of app-managed deletion) This completes the four-phase audit log work: 1. platform-api as audit hub 2. External system ingest (Authentik / Stalwart / OCIS) 3. Hash-chain + signed checkpoints (tamper evidence) 4. Cold-storage archival (retention without unbounded Mongo growth)
2026-05-24 21:03:41 +02:00
parent 9435baa09d
commit 4d9e906ec1
13 changed files with 1279 additions and 10 deletions
@@ -72,13 +72,16 @@ function shortIp(ip?: string) {
  return ip.replace(/^::ffff:/, '')
 }

-// ── Tamper-evidence (Phase 3) ──────────────────────────────────────────
+// ── Tamper-evidence (Phase 3) + cold-storage archives (Phase 4) ────────
 interface VerifyReport {
  ok: boolean
  totalEventsVerified: number
  checkpointsChecked: number
  latestCheckpointAt: string | null
  latestVerifiedSeq: number | null
+  // Phase 4 additions — included in /audit/verify response.
+  oldestHotSeq: number | null
+  highestArchivedSeq: number | null
  break?:
    | { kind: 'event-hash-mismatch'; seq: number; expected: string; actual: string }
    | { kind: 'event-prev-hash-mismatch'; seq: number; expected: string; actual: string }
@@ -90,13 +93,30 @@ interface CheckpointSummary {
  headHash: string | null
  reason?: string
 }
+interface ArchiveBatch {
+  _id: string
+  archivedAt: string
+  startSeq: number
+  endSeq: number
+  eventCount: number
+  manifestSha256: string
+  jsonlKey: string
+  manifestKey: string
+  bytesUncompressed: number
+}

 const { data: latestCp, refresh: refreshCp } = useLazyFetch<CheckpointSummary>(
  '/api/audit/checkpoint/latest',
  { default: () => ({ at: null, headSeq: null, headHash: null }), server: false },
 )
+const { data: archives, refresh: refreshArchives } = useLazyFetch<ArchiveBatch[]>(
+  '/api/audit/archives',
+  { default: () => [], server: false },
+)
 const verifyReport = ref<VerifyReport | null>(null)
 const verifying = ref(false)
+const archiving = ref(false)
+const archiveResult = ref<{ ok: boolean; reason?: string; eventCount?: number; startSeq?: number; endSeq?: number } | null>(null)

 async function runVerify() {
  verifying.value = true
@@ -113,6 +133,23 @@ async function forceCheckpoint() {
  await refreshCp()
 }

+async function forceArchive() {
+  archiving.value = true
+  archiveResult.value = null
+  try {
+    archiveResult.value = await $fetch('/api/audit/archive/run', { method: 'POST' })
+    await Promise.all([refreshArchives(), refresh()])
+  } finally {
+    archiving.value = false
+  }
+}
+
+function fmtBytes(n: number): string {
+  if (n < 1024) return `${n} B`
+  if (n < 1024 * 1024) return `${(n / 1024).toFixed(1)} KB`
+  return `${(n / 1024 / 1024).toFixed(1)} MB`
+}
+
 function fmtRelative(iso: string | null | undefined): string {
  if (!iso) return 'never'
  const ms = Date.now() - new Date(iso).getTime()
@@ -259,10 +296,62 @@ function fmtRelative(iso: string | null | undefined): string {
        </div>
      </Card>

+      <!-- Cold-storage archives — Phase 4 -->
+      <Card :pad="0" class="archive-card">
+        <div class="archive-head">
+          <div>
+            <Eyebrow>Cold storage</Eyebrow>
+            <div class="cap">
+              {{
+                archives?.length
+                  ? `archived through seq ${archives[0].endSeq} · ${archives.length} batch${archives.length === 1 ? '' : 'es'}`
+                  : 'no archives yet · 90-day hot retention'
+              }}
+            </div>
+          </div>
+          <UiButton variant="secondary" :disabled="archiving" @click="forceArchive">
+            {{ archiving ? 'Archiving…' : 'Run archive now' }}
+          </UiButton>
+        </div>
+
+        <div v-if="archiveResult" class="archive-result" :data-ok="archiveResult.ok">
+          <Badge v-if="archiveResult.ok && archiveResult.eventCount" tone="ok" dot>archived</Badge>
+          <Badge v-else-if="archiveResult.ok" tone="info" dot>no-op</Badge>
+          <Badge v-else tone="bad" dot>failed</Badge>
+          <Mono v-if="archiveResult.ok && archiveResult.eventCount">
+            {{ archiveResult.eventCount }} event(s) · seq {{ archiveResult.startSeq }}–{{ archiveResult.endSeq }}
+          </Mono>
+          <Mono v-else dim>{{ archiveResult.reason || '—' }}</Mono>
+        </div>
+
+        <table v-if="archives?.length">
+          <thead>
+            <tr>
+              <th>Archived</th>
+              <th>Seq range</th>
+              <th>Events</th>
+              <th>Size</th>
+              <th>Manifest sha256</th>
+            </tr>
+          </thead>
+          <tbody>
+            <tr v-for="b in archives" :key="b._id">
+              <td><Mono>{{ fmtAbs(b.archivedAt) }}</Mono></td>
+              <td><Mono>{{ b.startSeq }}–{{ b.endSeq }}</Mono></td>
+              <td><Mono>{{ b.eventCount }}</Mono></td>
+              <td><Mono dim>{{ fmtBytes(b.bytesUncompressed) }}</Mono></td>
+              <td><Mono dim>{{ b.manifestSha256.slice(0, 16) }}…</Mono></td>
+            </tr>
+          </tbody>
+        </table>
+        <div v-else class="empty"><Mono dim>// no archive batches yet — events stay in hot Mongo for {{ '90' }} days, then move to S3 (MinIO in dev / Hetzner in prod)</Mono></div>
+      </Card>
+
      <Mono dim class="note">
-        // sourced from /audit on platform-api · append-only · sha256 hash-chain
-        with HMAC-signed checkpoints every 100 events or 5 minutes · retention
-        + cold-storage archival to Hetzner Object Storage is Phase 4
+        // hot tier: Mongo · cold tier: S3-compatible object storage ·
+        sha256 hash-chain with HMAC-signed checkpoints + signed archive
+        manifests · retention 90 days hot, indefinite cold · production
+        encryption at rest is SSE-S3
      </Mono>
    </div>
  </div>
@@ -368,4 +457,26 @@ td.actor { display: flex; align-items: center; gap: 10px; }
 .verify-result[data-ok="true"]  { background: rgba(31, 138, 91, 0.05); }
 .verify-result[data-ok="false"] { background: rgba(240, 88, 88, 0.06); }
 .result-line { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
+
+/* Cold-storage archives panel */
+.archive-card { margin-top: 8px; }
+.archive-head {
+  padding: 14px 18px;
+  display: flex; justify-content: space-between; align-items: center;
+  gap: 16px;
+  border-bottom: 1px solid var(--border);
+}
+.archive-head .cap { font-family: var(--font-display); font-weight: 600; font-size: 15px; margin-top: 2px; }
+.archive-result {
+  padding: 10px 18px;
+  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
+  border-bottom: 1px solid var(--border);
+}
+.archive-result[data-ok="true"]  { background: rgba(31, 138, 91, 0.05); }
+.archive-result[data-ok="false"] { background: rgba(240, 88, 88, 0.06); }
+.archive-card table { width: 100%; border-collapse: collapse; }
+.archive-card th, .archive-card td { padding: 10px 18px; font-size: 12px; text-align: left; }
+.archive-card th { font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-mute); font-weight: 500; border-bottom: 1px solid var(--border); }
+.archive-card td { border-top: 1px solid var(--border); }
+.archive-card .empty { padding: 16px 18px; }
 </style>
@@ -0,0 +1,9 @@
+import { platformApi } from '~~/server/utils/platform-api'
+
+export default defineEventHandler(async (event) => {
+  // We force override=true here because this proxy is only callable from the
+  // operator UI's "Run archive now" button, which is explicitly a dev/ops
+  // exercise of the cold-storage path. Production may want to remove this
+  // proxy entirely once schedulers are trusted.
+  return platformApi(event, '/audit/archive/run?override=true', { method: 'POST' })
+})
@@ -0,0 +1,3 @@
+import { platformApi } from '~~/server/utils/platform-api'
+
+export default defineEventHandler((event) => platformApi(event, '/audit/archives'))
@@ -32,6 +32,9 @@ volumes:
  portal_node_modules:
  platform_api_node_modules:
  operator_node_modules:
+  # MinIO data (S3-compatible cold storage for audit archives). Production
+  # swaps the endpoint to Hetzner Object Storage and this volume goes away.
+  minio_data:

 services:
  # ─────────────────────────────────────────────────────────────────
@@ -127,6 +130,52 @@ services:
      timeout: 3s
      retries: 5

+  # ─────────────────────────────────────────────────────────────────
+  # MinIO — S3-compatible cold storage for audit archives (Phase 4).
+  # Production swaps endpoint to Hetzner Object Storage; same protocol.
+  # ─────────────────────────────────────────────────────────────────
+  minio:
+    image: minio/minio:latest
+    container_name: dezky-minio
+    restart: unless-stopped
+    command: server /data --console-address ":9001"
+    environment:
+      MINIO_ROOT_USER: ${MINIO_ROOT_USER}
+      MINIO_ROOT_PASSWORD: ${MINIO_ROOT_PASSWORD}
+    volumes:
+      - minio_data:/data
+    networks: [dezky]
+    healthcheck:
+      test: ["CMD", "mc", "ready", "local"]
+      interval: 10s
+      timeout: 3s
+      retries: 5
+    labels:
+      - traefik.enable=true
+      # Optional: expose MinIO admin UI behind Traefik. Dev only — production
+      # uses Hetzner's console.
+      - traefik.http.routers.minio.rule=Host(`minio.dezky.local`)
+      - traefik.http.routers.minio.tls=true
+      - traefik.http.services.minio.loadbalancer.server.port=9001
+
+  # One-shot init container that creates the audit bucket if it doesn't
+  # exist. Idempotent — re-running is a no-op. Exits cleanly so docker
+  # doesn't restart it.
+  minio-init:
+    image: minio/mc:latest
+    container_name: dezky-minio-init
+    depends_on:
+      minio:
+        condition: service_healthy
+    networks: [dezky]
+    entrypoint: >
+      sh -c "
+      mc alias set local http://minio:9000 ${MINIO_ROOT_USER} ${MINIO_ROOT_PASSWORD} &&
+      mc mb --ignore-existing local/dezky-audit &&
+      echo 'MinIO bucket dezky-audit ready'
+      "
+    restart: "no"
+
  # ─────────────────────────────────────────────────────────────────
  # Authentik — Identity provider (OIDC/SAML SSO)
  # ─────────────────────────────────────────────────────────────────
@@ -485,6 +534,18 @@ services:
      # out the current segment with a key-rotation checkpoint (not in scope
      # for Phase 3). Prod swaps HMAC for ed25519 from an HSM.
      AUDIT_SIGNING_KEY: ${AUDIT_SIGNING_KEY}
+      # Cold storage (Phase 4). Dev uses MinIO on the docker network; prod
+      # swaps endpoint to Hetzner Object Storage and provides real IAM keys.
+      # ARCHIVE_ENABLED defaults to false in dev so the worker doesn't move
+      # data we still want to query while building. The UI "Run archive now"
+      # button bypasses this gate.
+      AUDIT_COLD_ENDPOINT: http://minio:9000
+      AUDIT_COLD_REGION: us-east-1
+      AUDIT_COLD_BUCKET: dezky-audit
+      AUDIT_COLD_ACCESS_KEY: ${MINIO_ROOT_USER}
+      AUDIT_COLD_SECRET_KEY: ${MINIO_ROOT_PASSWORD}
+      AUDIT_HOT_RETENTION_DAYS: "90"
+      ARCHIVE_ENABLED: "false"
    volumes:
      - ../../services/platform-api:/app
      - platform_api_node_modules:/app/node_modules
@@ -13,6 +13,7 @@
    "typecheck": "tsc --noEmit"
  },
  "dependencies": {
+    "@aws-sdk/client-s3": "^3.700.0",
    "@nestjs/common": "^10.4.0",
    "@nestjs/core": "^10.4.0",
    "@nestjs/platform-fastify": "^10.4.0",
@@ -8,6 +8,9 @@ importers:

  .:
    dependencies:
+      '@aws-sdk/client-s3':
+        specifier: ^3.700.0
+        version: 3.1053.0
      '@nestjs/common':
        specifier: ^10.4.0
        version: 10.4.22(class-transformer@0.5.1)(class-validator@0.14.4)(reflect-metadata@0.2.2)(rxjs@7.8.2)
@@ -78,6 +81,125 @@ packages:
    resolution: {integrity: sha512-I5wviiIqiFwar9Pdk30Lujk8FczEEc18i22A5c6Z9lbmhPQdTroDnEQdsfXjy404wPe8H62s0I15o4pmMGfTYQ==}
    engines: {node: ^18.13.0 || >=20.9.0, npm: ^6.11.0 || ^7.5.6 || >=8.0.0, yarn: '>= 1.13.0'}

+  '@aws-crypto/crc32@5.2.0':
+    resolution: {integrity: sha512-nLbCWqQNgUiwwtFsen1AdzAtvuLRsQS8rYgMuxCrdKf9kOssamGLuPwyTY9wyYblNr9+1XM8v6zoDTPPSIeANg==}
+    engines: {node: '>=16.0.0'}
+
+  '@aws-crypto/crc32c@5.2.0':
+    resolution: {integrity: sha512-+iWb8qaHLYKrNvGRbiYRHSdKRWhto5XlZUEBwDjYNf+ly5SVYG6zEoYIdxvf5R3zyeP16w4PLBn3rH1xc74Rag==}
+
+  '@aws-crypto/sha1-browser@5.2.0':
+    resolution: {integrity: sha512-OH6lveCFfcDjX4dbAvCFSYUjJZjDr/3XJ3xHtjn3Oj5b9RjojQo8npoLeA/bNwkOkrSQ0wgrHzXk4tDRxGKJeg==}
+
+  '@aws-crypto/sha256-browser@5.2.0':
+    resolution: {integrity: sha512-AXfN/lGotSQwu6HNcEsIASo7kWXZ5HYWvfOmSNKDsEqC4OashTp8alTmaz+F7TC2L083SFv5RdB+qU3Vs1kZqw==}
+
+  '@aws-crypto/sha256-js@5.2.0':
+    resolution: {integrity: sha512-FFQQyu7edu4ufvIZ+OadFpHHOt+eSTBaYaki44c+akjg7qZg9oOQeLlk77F6tSYqjDAFClrHJk9tMf0HdVyOvA==}
+    engines: {node: '>=16.0.0'}
+
+  '@aws-crypto/supports-web-crypto@5.2.0':
+    resolution: {integrity: sha512-iAvUotm021kM33eCdNfwIN//F77/IADDSs58i+MDaOqFrVjZo9bAal0NK7HurRuWLLpF1iLX7gbWrjHjeo+YFg==}
+
+  '@aws-crypto/util@5.2.0':
+    resolution: {integrity: sha512-4RkU9EsI6ZpBve5fseQlGNUWKMa1RLPQ1dnjnQoe07ldfIzcsGb5hC5W0Dm7u423KWzawlrpbjXBrXCEv9zazQ==}
+
+  '@aws-sdk/client-s3@3.1053.0':
+    resolution: {integrity: sha512-/oGxoB6p1Nqs935Blt+v1o+anSCEf2n3RjIrcLz84i4cn2Gr+Z7JpDdUkG5+74r5ctqEPG7k/phTGbJ9fNKnHg==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/core@3.974.13':
+    resolution: {integrity: sha512-+Y5/4tHki0uYgyx8eun146DegRVQBpdKGK5RbV0FTKJPpaKTchvqVxrrRFK6Wk0JksO4iAZKw3eqxGEIwtO98w==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/crc64-nvme@3.972.9':
+    resolution: {integrity: sha512-P+QGozmXn2mZZI7sDgk+aUm+RTI61MPSFB+Ir2vjEjEbEsE4e7hYtzrDvAUxZy9ko81h53e11+F/GYlvwDkaOQ==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/credential-provider-env@3.972.39':
+    resolution: {integrity: sha512-29wX9zpAvEt1vcj0psha+y6ygBHy2V/S72mp6e7q0KARLWXq+pwE/lR6qGkwknQvruh52lXvlqZIga8Hdxkucw==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/credential-provider-http@3.972.41':
+    resolution: {integrity: sha512-IA3CQTjtJkb6u1H4mE4936c8OPBMa9Jggtwe8U2Mqw/vvb/tZ5Ebd0mcZcX0uKWQhOyYo/+qNIwkV5Xh+FeJJA==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/credential-provider-ini@3.972.43':
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+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/credential-provider-login@3.972.43':
+    resolution: {integrity: sha512-HG7kQCwXtbv3oBV61Ins0oNX8KKyvrMqqRkb6ZiAfQHbMuHaiNaEb2KnpKLPkNpqImSBK82UkVE/kaY6IfWikA==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/credential-provider-node@3.972.44':
+    resolution: {integrity: sha512-sDaBIT0yrNNIPfvlsiTCmANm07zKju+ipWODjEXgZlsjMeIJR3LVp7RDyAOzUoAsTbDfYKDWp+i5WrFiQP6rmQ==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/credential-provider-process@3.972.39':
+    resolution: {integrity: sha512-2k/amBifLd75eXNwgvPw/2lKYSQ3NhvHQgkVKVjfUq13/eJ3JRtHmznuFenn74OK3sSfp4SMy1YB2w+UVXoKqA==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/credential-provider-sso@3.972.43':
+    resolution: {integrity: sha512-LPc3+Y4vhH1T4x6CMqwCM6hk5+SRf/Lwmgm8INm95wxTtIRHcMwQUVkDzWu4Iw/RSncxYM2BC01OrYbxOPZvyg==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/credential-provider-web-identity@3.972.43':
+    resolution: {integrity: sha512-wQtL34lUD/09VXjwAUo2T+I3aEXRDxMB3DKmTJL/Zj0Gi6sLDTrVhae1XVt01yzkquOWajI/sZW72JGDZ1ciTw==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/middleware-bucket-endpoint@3.972.15':
+    resolution: {integrity: sha512-O2HDANa+MrvbxpaRVQDiH3T13uAa9AkMjKyZmDygwauAmmvqZ5B0iRmKW+fuVGW6NPXuyXurFgIx69lSvmAWGA==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/middleware-expect-continue@3.972.13':
+    resolution: {integrity: sha512-sHiqIFg8o2ipT7t40B89Vj0ubSUtY6OSt/+Ee/OXhHch5K4+81zP2+QX8Lkc/nJ2QSmCySxOke7TEbmX69fe2g==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/middleware-flexible-checksums@3.974.21':
+    resolution: {integrity: sha512-alAu9heyiBK/OmRNXVxq8mmPTgeW2AQ6EYjRsI38kPZa1MZvt2Jh+BlGq7/GG9OVXOaEgD7DlGj/Lzfy5OmuEg==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/middleware-location-constraint@3.972.11':
+    resolution: {integrity: sha512-hkfspNUP4criAH6ton6BGKgnm5dZx+7bUOy1YqlTfejDeUPAM23D81q/IX+hdlS3KUsfwGz5ADTqZWKBEUpf4A==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/middleware-sdk-s3@3.972.42':
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+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/middleware-ssec@3.972.11':
+    resolution: {integrity: sha512-7PQvGNhtveKlvVqNahqWx5yrwxP7ecwAoB1dYBf8eKwfo2tzzCbNnW+q2nO3N066ktQaB4iBQbDRWtizm+amoQ==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/nested-clients@3.997.11':
+    resolution: {integrity: sha512-nWXXJ1r/r8N2Gw1pWolRgED38/A9A8DHR2ETWIv220zh4PZHcybbR4hUVWWktmNXTRHzDJwRluapHn0rZxuoqA==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/signature-v4-multi-region@3.996.28':
+    resolution: {integrity: sha512-qs9z5LqXO/CZC2Lg9SGKpoLU8Rhi+m2pFKZqfO9pytX1clc0katqtsDNupJxFy0xT9wsZSPzM2v1y+/H/zfp5Q==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/token-providers@3.1052.0':
+    resolution: {integrity: sha512-QqZNB3so7UIDxZtroc85TQaLVxdZRFm0eWM1CSR2N+b06as9TOrilvrlTZuj3guYlxMs6yLOgGxnklJ5qMYtTw==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/types@3.973.9':
+    resolution: {integrity: sha512-kuBfgQVdcz5Bmapc4A13YbpVw/pXkesfhetcFYwbntqas8sF41OHyd4o28+/TG2ZQdHBsv90Lsu5y6oitvYCdg==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/util-locate-window@3.965.5':
+    resolution: {integrity: sha512-WhlJNNINQB+9qtLtZJcpQdgZw3SCDCpXdUJP7cToGwHbCWCnRckGlc6Bx/OhWwIYFNAn+FIydY8SZ0QmVu3xTQ==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws-sdk/xml-builder@3.972.25':
+    resolution: {integrity: sha512-GH+Kjz4nPKWKHnsiQpnhP1MJdTGIcK4rAka6tzakgjjUkVgNsmPeEbbRAf09SzS1hjGu6duGHCBsxYke0BhHjQ==}
+    engines: {node: '>=20.0.0'}
+
+  '@aws/lambda-invoke-store@0.2.4':
+    resolution: {integrity: sha512-iY8yvjE0y651BixKNPgmv1WrQc+GZ142sb0z4gYnChDDY2YqI4P/jsSopBWrKfAt7LOJAkOXt7rC/hms+WclQQ==}
+    engines: {node: '>=18.0.0'}
+
  '@babel/code-frame@7.29.0':
    resolution: {integrity: sha512-9NhCeYjq9+3uxgdtp20LSiJXJvN0FeCtNGpJxuMFZ1Kv3cWUNb6DOhJwUvcVCzKGR66cw4njwM6hrJLqgOwbcw==}
    engines: {node: '>=6.9.0'}
@@ -240,6 +362,9 @@ packages:
      '@nestjs/platform-express':
        optional: true

+  '@nodable/entities@2.1.0':
+    resolution: {integrity: sha512-nyT7T3nbMyBI/lvr6L5TyWbFJAI9FTgVRakNoBqCD+PmID8DzFrrNdLLtHMwMszOtqZa8PAOV24ZqDnQrhQINA==}
+
  '@nuxtjs/opencollective@0.3.2':
    resolution: {integrity: sha512-um0xL3fO7Mf4fDxcqx9KryrB7zgRM5JSlvGN5AGkP6JLM5XEKyjeAiPbNxdXVXQ16isuAhYpvP88NgL2BGd6aA==}
    engines: {node: '>=8.0.0', npm: '>=5.0.0'}
@@ -252,6 +377,42 @@ packages:
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    engines: {node: '>=14'}

+  '@smithy/core@3.24.4':
+    resolution: {integrity: sha512-3UNRKEyQyAgVgM0LGlerCLm+ChZWZ1GPfde+jBEW6bm6bSBGU1p0EbblaUV3unbhwvidjLA5Zs3sOs7mnZwvAw==}
+    engines: {node: '>=18.0.0'}
+
+  '@smithy/credential-provider-imds@4.3.4':
+    resolution: {integrity: sha512-vKW0MEFRU4Y3MkVZUkpJm+g9qyPGLCXhc0YLggUdSdBB4g7IaSSsCE75P9rBXyWHrXY1UYSQUl8/DwsTR7QciA==}
+    engines: {node: '>=18.0.0'}
+
+  '@smithy/fetch-http-handler@5.4.4':
+    resolution: {integrity: sha512-qM7AUKI4G6d7lNgaZD3lA1tWSolh5r6gcixfTZAPstVURfjIbvreVTPz+994M0yC3HbX4YYhDRgr31Xy3XwWOQ==}
+    engines: {node: '>=18.0.0'}
+
+  '@smithy/is-array-buffer@2.2.0':
+    resolution: {integrity: sha512-GGP3O9QFD24uGeAXYUjwSTXARoqpZykHadOmA8G5vfJPK0/DC67qa//0qvqrJzL1xc8WQWX7/yc7fwudjPHPhA==}
+    engines: {node: '>=14.0.0'}
+
+  '@smithy/node-http-handler@4.7.4':
+    resolution: {integrity: sha512-HIeF+1vrDGzPkkv39Hj2vlHSXHY3p958jd/8ZnePIY6+ZOsQX8coyEUKO5yQu4r0bQIVsbpotVIrXXwyycMStQ==}
+    engines: {node: '>=18.0.0'}
+
+  '@smithy/signature-v4@5.4.4':
+    resolution: {integrity: sha512-e5UtkMvsatzBfbeBZjEOt0k0Z3BEsjTFL/n6fdO5vtBLe67tdy0dX7xw2DU7uZ3acwoHyeCqpU2Fzb7pxwHb6Q==}
+    engines: {node: '>=18.0.0'}
+
+  '@smithy/types@4.14.2':
+    resolution: {integrity: sha512-P+otAxbV4CqBybp7EkcJCrig63yE2E7PuNVOmilVMRcx/O+QDzGULTrKsq4DV13gSfak9ObPrWaHl/9bL5YcWw==}
+    engines: {node: '>=18.0.0'}
+
+  '@smithy/util-buffer-from@2.2.0':
+    resolution: {integrity: sha512-IJdWBbTcMQ6DA0gdNhh/BwrLkDR+ADW5Kr1aZmd4k3DIF6ezMV4R2NIAmT08wQJ3yUK82thHWmC/TnK/wpMMIA==}
+    engines: {node: '>=14.0.0'}
+
+  '@smithy/util-utf8@2.3.0':
+    resolution: {integrity: sha512-R8Rdn8Hy72KKcebgLiv8jQcQkXoLMOGGv5uI1/k0l+snqkOzQ1R0ChUBCxWMlBsFMekWjq0wRudIweFs7sKT5A==}
+    engines: {node: '>=14.0.0'}
+
  '@tokenizer/inflate@0.2.7':
    resolution: {integrity: sha512-MADQgmZT1eKjp06jpI2yozxaU9uVs4GzzgSL+uEq7bVcJ9V1ZXQkeGNql1fsSI0gMy1vhvNTNbUqrx+pZfJVmg==}
    engines: {node: '>=18'}
@@ -455,6 +616,9 @@ packages:
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    resolution: {integrity: sha512-1W07cM9gS6DcLperZfFSj+bWLtaPGSOHWhPiGzXmvVJbRLdG82sH/Kn8EtW1VqWVA54AKf2h5k5BbnIbwF3h6w==}

+  bowser@2.14.1:
+    resolution: {integrity: sha512-tzPjzCxygAKWFOJP011oxFHs57HzIhOEracIgAePE4pqB3LikALKnSzUyU4MGs9/iCEUuHlAJTjTc5M+u7YEGg==}
+
  brace-expansion@1.1.14:
    resolution: {integrity: sha512-MWPGfDxnyzKU7rNOW9SP/c50vi3xrmrua/+6hfPbCS2ABNWfx24vPidzvC7krjU/RTo235sV776ymlsMtGKj8g==}

@@ -729,6 +893,13 @@ packages:
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    resolution: {integrity: sha512-rVjf7ArG3LTk+FS6Yw81V1DLuZl1bRbNrev6Tmd/9RaroeeRRJhAt7jg/6YFxbvAQXUCavSoZhPPj6oOx+5KjQ==}

+  fast-xml-builder@1.2.0:
+    resolution: {integrity: sha512-00aAWieqff+ZJhsXA4g1g7M8k+7AYoMUUHF+/zFb5U6Uv/P0Vl4QZo84/IcufzYalLuEj9928bXN9PbbFzMF0Q==}
+
+  fast-xml-parser@5.7.3:
+    resolution: {integrity: sha512-C0AaNuC+mscy6vrAQKAc/rMq+zAPHodfHGZu4sGVehvAQt/JLG1O5zEcYcXSY5zSqr4YVgxsB+pHXTq0i7eDlg==}
+    hasBin: true
+
  fastify-plugin@4.5.1:
    resolution: {integrity: sha512-stRHYGeuqpEZTL1Ef0Ovr2ltazUT9g844X5z/zEBFLG8RYlpDiOCIG+ATvYEp+/zmc7sN29mcIMp8gvYplYPIQ==}

@@ -1131,6 +1302,10 @@ packages:
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    engines: {node: '>=8'}

+  path-expression-matcher@1.5.0:
+    resolution: {integrity: sha512-cbrerZV+6rvdQrrD+iGMcZFEiiSrbv9Tfdkvnusy6y0x0GKBXREFg/Y65GhIfm0tnLntThhzCnfKwp1WRjeCyQ==}
+    engines: {node: '>=14.0.0'}
+
  path-key@3.1.1:
    resolution: {integrity: sha512-ojmeN0qd+y0jszEtoY48r0Peq5dwMEkIlCOu6Q5f41lfkswXuKtYrhgoTpLnyIcHm24Uhqx+5Tqm2InSwLhE6Q==}
    engines: {node: '>=8'}
@@ -1348,6 +1523,9 @@ packages:
    resolution: {integrity: sha512-vavAMRXOgBVNF6nyEEmL3DBK19iRpDcoIwW+swQ+CbGiu7lju6t+JklA1MHweoWtadgt4ISVUsXLyDq34ddcwA==}
    engines: {node: '>=4'}

+  strnum@2.3.0:
+    resolution: {integrity: sha512-ums3KNd42PGyx5xaoVTO1mjU1bH3NpY4vsrVlnv9PNGqQj8wd7rJ6nEypLrJ7z5vxK5RP0yMLo6J/Gsm62DI5Q==}
+
  strtok3@10.3.5:
    resolution: {integrity: sha512-ki4hZQfh5rX0QDLLkOCj+h+CVNkqmp/CMf8v8kZpkNVK6jGQooMytqzLZYUVYIZcFZ6yDB70EfD8POcFXiF5oA==}
    engines: {node: '>=18'}
@@ -1578,6 +1756,10 @@ packages:
    resolution: {integrity: sha512-si7QWI6zUMq56bESFvagtmzMdGOtoxfR+Sez11Mobfc7tm+VkUckk9bW2UeffTGVUbOksxmSw0AA2gs8g71NCQ==}
    engines: {node: '>=12'}

+  xml-naming@0.1.0:
+    resolution: {integrity: sha512-k8KO9hrMyNk6tUWqUfkTEZbezRRpONVOzUTnc97VnCvyj6Tf9lyUR9EDAIeiVLv56jsMcoXEwjW8Kv5yPY52lw==}
+    engines: {node: '>=16.0.0'}
+
  yargs-parser@21.1.1:
    resolution: {integrity: sha512-tVpsJW7DdjecAiFpbIB1e3qxIQsE6NoPc5/eTdrbbIC4h0LVsWhnoa3g+m2HclBIujHzsxZ4VJVA+GUuc2/LBw==}
    engines: {node: '>=12'}
@@ -1620,6 +1802,271 @@ snapshots:
    transitivePeerDependencies:
      - chokidar

+  '@aws-crypto/crc32@5.2.0':
+    dependencies:
+      '@aws-crypto/util': 5.2.0
+      '@aws-sdk/types': 3.973.9
+      tslib: 2.8.1
+
+  '@aws-crypto/crc32c@5.2.0':
+    dependencies:
+      '@aws-crypto/util': 5.2.0
+      '@aws-sdk/types': 3.973.9
+      tslib: 2.8.1
+
+  '@aws-crypto/sha1-browser@5.2.0':
+    dependencies:
+      '@aws-crypto/supports-web-crypto': 5.2.0
+      '@aws-crypto/util': 5.2.0
+      '@aws-sdk/types': 3.973.9
+      '@aws-sdk/util-locate-window': 3.965.5
+      '@smithy/util-utf8': 2.3.0
+      tslib: 2.8.1
+
+  '@aws-crypto/sha256-browser@5.2.0':
+    dependencies:
+      '@aws-crypto/sha256-js': 5.2.0
+      '@aws-crypto/supports-web-crypto': 5.2.0
+      '@aws-crypto/util': 5.2.0
+      '@aws-sdk/types': 3.973.9
+      '@aws-sdk/util-locate-window': 3.965.5
+      '@smithy/util-utf8': 2.3.0
+      tslib: 2.8.1
+
+  '@aws-crypto/sha256-js@5.2.0':
+    dependencies:
+      '@aws-crypto/util': 5.2.0
+      '@aws-sdk/types': 3.973.9
+      tslib: 2.8.1
+
+  '@aws-crypto/supports-web-crypto@5.2.0':
+    dependencies:
+      tslib: 2.8.1
+
+  '@aws-crypto/util@5.2.0':
+    dependencies:
+      '@aws-sdk/types': 3.973.9
+      '@smithy/util-utf8': 2.3.0
+      tslib: 2.8.1
+
+  '@aws-sdk/client-s3@3.1053.0':
+    dependencies:
+      '@aws-crypto/sha1-browser': 5.2.0
+      '@aws-crypto/sha256-browser': 5.2.0
+      '@aws-crypto/sha256-js': 5.2.0
+      '@aws-sdk/core': 3.974.13
+      '@aws-sdk/credential-provider-node': 3.972.44
+      '@aws-sdk/middleware-bucket-endpoint': 3.972.15
+      '@aws-sdk/middleware-expect-continue': 3.972.13
+      '@aws-sdk/middleware-flexible-checksums': 3.974.21
+      '@aws-sdk/middleware-location-constraint': 3.972.11
+      '@aws-sdk/middleware-sdk-s3': 3.972.42
+      '@aws-sdk/middleware-ssec': 3.972.11
+      '@aws-sdk/signature-v4-multi-region': 3.996.28
+      '@aws-sdk/types': 3.973.9
+      '@smithy/core': 3.24.4
+      '@smithy/fetch-http-handler': 5.4.4
+      '@smithy/node-http-handler': 4.7.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/core@3.974.13':
+    dependencies:
+      '@aws-sdk/types': 3.973.9
+      '@aws-sdk/xml-builder': 3.972.25
+      '@aws/lambda-invoke-store': 0.2.4
+      '@smithy/core': 3.24.4
+      '@smithy/signature-v4': 5.4.4
+      '@smithy/types': 4.14.2
+      bowser: 2.14.1
+      tslib: 2.8.1
+
+  '@aws-sdk/crc64-nvme@3.972.9':
+    dependencies:
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/credential-provider-env@3.972.39':
+    dependencies:
+      '@aws-sdk/core': 3.974.13
+      '@aws-sdk/types': 3.973.9
+      '@smithy/core': 3.24.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/credential-provider-http@3.972.41':
+    dependencies:
+      '@aws-sdk/core': 3.974.13
+      '@aws-sdk/types': 3.973.9
+      '@smithy/core': 3.24.4
+      '@smithy/fetch-http-handler': 5.4.4
+      '@smithy/node-http-handler': 4.7.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/credential-provider-ini@3.972.43':
+    dependencies:
+      '@aws-sdk/core': 3.974.13
+      '@aws-sdk/credential-provider-env': 3.972.39
+      '@aws-sdk/credential-provider-http': 3.972.41
+      '@aws-sdk/credential-provider-login': 3.972.43
+      '@aws-sdk/credential-provider-process': 3.972.39
+      '@aws-sdk/credential-provider-sso': 3.972.43
+      '@aws-sdk/credential-provider-web-identity': 3.972.43
+      '@aws-sdk/nested-clients': 3.997.11
+      '@aws-sdk/types': 3.973.9
+      '@smithy/core': 3.24.4
+      '@smithy/credential-provider-imds': 4.3.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/credential-provider-login@3.972.43':
+    dependencies:
+      '@aws-sdk/core': 3.974.13
+      '@aws-sdk/nested-clients': 3.997.11
+      '@aws-sdk/types': 3.973.9
+      '@smithy/core': 3.24.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/credential-provider-node@3.972.44':
+    dependencies:
+      '@aws-sdk/credential-provider-env': 3.972.39
+      '@aws-sdk/credential-provider-http': 3.972.41
+      '@aws-sdk/credential-provider-ini': 3.972.43
+      '@aws-sdk/credential-provider-process': 3.972.39
+      '@aws-sdk/credential-provider-sso': 3.972.43
+      '@aws-sdk/credential-provider-web-identity': 3.972.43
+      '@aws-sdk/types': 3.973.9
+      '@smithy/core': 3.24.4
+      '@smithy/credential-provider-imds': 4.3.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/credential-provider-process@3.972.39':
+    dependencies:
+      '@aws-sdk/core': 3.974.13
+      '@aws-sdk/types': 3.973.9
+      '@smithy/core': 3.24.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/credential-provider-sso@3.972.43':
+    dependencies:
+      '@aws-sdk/core': 3.974.13
+      '@aws-sdk/nested-clients': 3.997.11
+      '@aws-sdk/token-providers': 3.1052.0
+      '@aws-sdk/types': 3.973.9
+      '@smithy/core': 3.24.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/credential-provider-web-identity@3.972.43':
+    dependencies:
+      '@aws-sdk/core': 3.974.13
+      '@aws-sdk/nested-clients': 3.997.11
+      '@aws-sdk/types': 3.973.9
+      '@smithy/core': 3.24.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/middleware-bucket-endpoint@3.972.15':
+    dependencies:
+      '@aws-sdk/core': 3.974.13
+      '@aws-sdk/types': 3.973.9
+      '@smithy/core': 3.24.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/middleware-expect-continue@3.972.13':
+    dependencies:
+      '@aws-sdk/types': 3.973.9
+      '@smithy/core': 3.24.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/middleware-flexible-checksums@3.974.21':
+    dependencies:
+      '@aws-crypto/crc32': 5.2.0
+      '@aws-crypto/crc32c': 5.2.0
+      '@aws-crypto/util': 5.2.0
+      '@aws-sdk/core': 3.974.13
+      '@aws-sdk/crc64-nvme': 3.972.9
+      '@aws-sdk/types': 3.973.9
+      '@smithy/core': 3.24.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/middleware-location-constraint@3.972.11':
+    dependencies:
+      '@aws-sdk/types': 3.973.9
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/middleware-sdk-s3@3.972.42':
+    dependencies:
+      '@aws-sdk/core': 3.974.13
+      '@aws-sdk/signature-v4-multi-region': 3.996.28
+      '@aws-sdk/types': 3.973.9
+      '@smithy/core': 3.24.4
+      '@smithy/signature-v4': 5.4.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/middleware-ssec@3.972.11':
+    dependencies:
+      '@aws-sdk/types': 3.973.9
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/nested-clients@3.997.11':
+    dependencies:
+      '@aws-crypto/sha256-browser': 5.2.0
+      '@aws-crypto/sha256-js': 5.2.0
+      '@aws-sdk/core': 3.974.13
+      '@aws-sdk/signature-v4-multi-region': 3.996.28
+      '@aws-sdk/types': 3.973.9
+      '@smithy/core': 3.24.4
+      '@smithy/fetch-http-handler': 5.4.4
+      '@smithy/node-http-handler': 4.7.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/signature-v4-multi-region@3.996.28':
+    dependencies:
+      '@aws-sdk/types': 3.973.9
+      '@smithy/core': 3.24.4
+      '@smithy/signature-v4': 5.4.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/token-providers@3.1052.0':
+    dependencies:
+      '@aws-sdk/core': 3.974.13
+      '@aws-sdk/nested-clients': 3.997.11
+      '@aws-sdk/types': 3.973.9
+      '@smithy/core': 3.24.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/types@3.973.9':
+    dependencies:
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@aws-sdk/util-locate-window@3.965.5':
+    dependencies:
+      tslib: 2.8.1
+
+  '@aws-sdk/xml-builder@3.972.25':
+    dependencies:
+      '@nodable/entities': 2.1.0
+      '@smithy/types': 4.14.2
+      fast-xml-parser: 5.7.3
+      tslib: 2.8.1
+
+  '@aws/lambda-invoke-store@0.2.4': {}
+
  '@babel/code-frame@7.29.0':
    dependencies:
      '@babel/helper-validator-identifier': 7.28.5
@@ -1820,6 +2267,8 @@ snapshots:
      '@nestjs/core': 10.4.22(@nestjs/common@10.4.22(class-transformer@0.5.1)(class-validator@0.14.4)(reflect-metadata@0.2.2)(rxjs@7.8.2))(reflect-metadata@0.2.2)(rxjs@7.8.2)
      tslib: 2.8.1

+  '@nodable/entities@2.1.0': {}
+
  '@nuxtjs/opencollective@0.3.2':
    dependencies:
      chalk: 4.1.2
@@ -1833,6 +2282,54 @@ snapshots:
  '@pkgjs/parseargs@0.11.0':
    optional: true

+  '@smithy/core@3.24.4':
+    dependencies:
+      '@aws-crypto/crc32': 5.2.0
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@smithy/credential-provider-imds@4.3.4':
+    dependencies:
+      '@smithy/core': 3.24.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@smithy/fetch-http-handler@5.4.4':
+    dependencies:
+      '@smithy/core': 3.24.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@smithy/is-array-buffer@2.2.0':
+    dependencies:
+      tslib: 2.8.1
+
+  '@smithy/node-http-handler@4.7.4':
+    dependencies:
+      '@smithy/core': 3.24.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@smithy/signature-v4@5.4.4':
+    dependencies:
+      '@smithy/core': 3.24.4
+      '@smithy/types': 4.14.2
+      tslib: 2.8.1
+
+  '@smithy/types@4.14.2':
+    dependencies:
+      tslib: 2.8.1
+
+  '@smithy/util-buffer-from@2.2.0':
+    dependencies:
+      '@smithy/is-array-buffer': 2.2.0
+      tslib: 2.8.1
+
+  '@smithy/util-utf8@2.3.0':
+    dependencies:
+      '@smithy/util-buffer-from': 2.2.0
+      tslib: 2.8.1
+
  '@tokenizer/inflate@0.2.7':
    dependencies:
      debug: 4.4.3
@@ -2055,6 +2552,8 @@ snapshots:
      inherits: 2.0.4
      readable-stream: 3.6.2

+  bowser@2.14.1: {}
+
  brace-expansion@1.1.14:
    dependencies:
      balanced-match: 1.0.2
@@ -2305,6 +2804,18 @@ snapshots:

  fast-uri@3.1.2: {}

+  fast-xml-builder@1.2.0:
+    dependencies:
+      path-expression-matcher: 1.5.0
+      xml-naming: 0.1.0
+
+  fast-xml-parser@5.7.3:
+    dependencies:
+      '@nodable/entities': 2.1.0
+      fast-xml-builder: 1.2.0
+      path-expression-matcher: 1.5.0
+      strnum: 2.3.0
+
  fastify-plugin@4.5.1: {}

  fastify@4.28.1:
@@ -2726,6 +3237,8 @@ snapshots:
      json-parse-even-better-errors: 2.3.1
      lines-and-columns: 1.2.4

+  path-expression-matcher@1.5.0: {}
+
  path-key@3.1.1: {}

  path-scurry@1.11.1:
@@ -2920,6 +3433,8 @@ snapshots:

  strip-bom@3.0.0: {}

+  strnum@2.3.0: {}
+
  strtok3@10.3.5:
    dependencies:
      '@tokenizer/token': 0.3.0
@@ -3134,6 +3649,8 @@ snapshots:
      string-width: 5.1.2
      strip-ansi: 7.2.0

+  xml-naming@0.1.0: {}
+
  yargs-parser@21.1.1: {}

  yn@3.1.1: {}
@@ -1,6 +1,7 @@
 import { Controller, Get, Post, Query, UseGuards } from '@nestjs/common'
 import { JwtAuthGuard } from '../auth/jwt-auth.guard.js'
 import { OperatorGuard } from '../auth/operator.guard.js'
+import { ArchiveService } from '../cold/archive.service.js'
 import { ListAuditDto } from './dto/list-audit.dto.js'
 import { AuditService } from './audit.service.js'
 import { CheckpointService } from './checkpoint.service.js'
@@ -11,10 +12,15 @@ import { AuditVerifier } from './verifier.service.js'
 // mutation in other modules. Operator-only because the trail is sensitive.
 //
 // Phase 3 surfaces:
-//   GET /audit/verify  — walks the chain + validates checkpoint signatures
-//   GET /audit/checkpoint/latest  — current "last verified" anchor for the UI
-//   POST /audit/checkpoint        — force a fresh checkpoint (rare; testing
-//                                  the chain or anchoring before an export)
+//   GET /audit/verify             — walks chain + validates checkpoint sigs
+//   GET /audit/checkpoint/latest  — current "last verified" anchor for UI
+//   POST /audit/checkpoint        — force a fresh checkpoint
+// Phase 4 surfaces:
+//   GET /audit/archives           — list archive batches (most recent first)
+//   POST /audit/archive/run       — manually trigger an archive run with
+//                                  override=true so the retention window
+//                                  is bypassed (used from the operator UI
+//                                  to exercise the cold-storage path in dev)
@Controller('audit')
@UseGuards(JwtAuthGuard, OperatorGuard)
 export class AuditController {
@@ -22,6 +28,7 @@ export class AuditController {
    private readonly audit: AuditService,
    private readonly checkpoints: CheckpointService,
    private readonly verifier: AuditVerifier,
+    private readonly archives: ArchiveService,
  ) {}

  @Get()
@@ -41,8 +48,15 @@ export class AuditController {
  }

  @Get('verify')
-  verify() {
-    return this.verifier.verify()
+  async verify() {
+    const base = await this.verifier.verify()
+    // Augment with tier boundary so the UI can show "events before X are
+    // archived, events from X+ are queryable here".
+    const [oldestHotSeq, highestArchivedSeq] = await Promise.all([
+      this.archives.oldestHotSeq(),
+      this.archives.highestArchivedSeq(),
+    ])
+    return { ...base, oldestHotSeq, highestArchivedSeq }
  }

  @Get('checkpoint/latest')
@@ -56,4 +70,30 @@ export class AuditController {
  forceCheckpoint() {
    return this.checkpoints.tryWrite('manual')
  }
+
+  @Get('archives')
+  async listArchives() {
+    const batches = await this.archives.listBatches(100)
+    return batches.map((b) => ({
+      _id: b._id,
+      archivedAt: b.archivedAt,
+      startSeq: b.startSeq,
+      endSeq: b.endSeq,
+      eventCount: b.eventCount,
+      manifestSha256: b.manifestSha256,
+      jsonlKey: b.jsonlKey,
+      manifestKey: b.manifestKey,
+      bytesUncompressed: b.bytesUncompressed,
+    }))
+  }
+
+  // `override=true` (the only mode we expose to the UI today) bypasses the
+  // 90-day retention check and archives everything older than now. This is
+  // how operators exercise the cold-storage path in dev without 3-month-old
+  // events. Production should disable this query param via a config flag
+  // before going live; for now it's gated behind OperatorGuard.
+  @Post('archive/run')
+  async runArchive(@Query('override') override?: string) {
+    return this.archives.runOnce({ override: override === 'true' })
+  }
 }
@@ -1,6 +1,7 @@
 import { Module } from '@nestjs/common'
 import { MongooseModule } from '@nestjs/mongoose'
 import { AuthModule } from '../auth/auth.module.js'
+import { ColdModule } from '../cold/cold.module.js'
 import {
  AuditCheckpoint,
  AuditCheckpointSchema,
@@ -18,6 +19,7 @@ import { AuditVerifier } from './verifier.service.js'
@Module({
  imports: [
    AuthModule,
+    ColdModule,
    MongooseModule.forFeature([
      { name: AuditEvent.name, schema: AuditEventSchema },
      { name: AuditCounter.name, schema: AuditCounterSchema },
@@ -0,0 +1,261 @@
+// Moves chained audit events older than AUDIT_HOT_RETENTION_DAYS from Mongo
+// to cold storage. Idempotent and crash-safe — events are deleted ONLY after
+// the JSONL + manifest have been confirmed in S3 (HEAD check). A failed
+// upload or HEAD check leaves the events in hot Mongo for the next run.
+//
+// Trust chain across tiers:
+//   - Hot events carry sha256 hash + prev-hash links (Phase 3).
+//   - When archived, the JSONL preserves these fields verbatim.
+//   - The manifest records the JSONL's sha256 + the boundary event hashes,
+//     signed with AUDIT_SIGNING_KEY (same key as Phase 3 checkpoints).
+//   - The Phase 3 checkpoint that covers the archived seq range still
+//     verifies — we're not orphaning chain integrity, just moving the
+//     events themselves.
+
+import { Injectable, Logger } from '@nestjs/common'
+import { ConfigService } from '@nestjs/config'
+import { InjectModel } from '@nestjs/mongoose'
+import { createHash, createHmac } from 'node:crypto'
+import { gzipSync } from 'node:zlib'
+import type { Model } from 'mongoose'
+import {
+  AuditEvent,
+  type AuditEventDocument,
+} from '../schemas/audit-event.schema.js'
+import {
+  ArchiveBatch,
+  type ArchiveBatchDocument,
+} from '../schemas/archive-batch.schema.js'
+import { ColdStorageClient } from './cold-storage.client.js'
+
+export interface ArchiveResult {
+  ok: boolean
+  reason?: string
+  batchId?: string
+  startSeq?: number
+  endSeq?: number
+  eventCount?: number
+}
+
+interface ArchiveManifest {
+  version: 1
+  startSeq: number
+  endSeq: number
+  eventCount: number
+  startedAt: string
+  endedAt: string
+  bytesUncompressed: number
+  bytesCompressed: number
+  sha256: string             // sha256 of the JSONL (uncompressed)
+  firstEventHash: string
+  lastEventHash: string
+  signature: string
+  sigAlg: 'HMAC-SHA-256'
+}
+
+@Injectable()
+export class ArchiveService {
+  private readonly logger = new Logger(ArchiveService.name)
+  private readonly retentionDays: number
+  private readonly signingKey: string
+  // Server-side encryption — opt-in via AUDIT_COLD_SSE=true. Production
+  // (Hetzner Object Storage) supports SSE-S3 natively. Dev/MinIO without
+  // a KMS rejects it with "KMS is not configured" so the default is off.
+  // Client-side encryption is a larger workstream tracked for later.
+  private readonly serverSideEncryption: 'AES256' | undefined
+
+  constructor(
+    @InjectModel(AuditEvent.name) private readonly events: Model<AuditEventDocument>,
+    @InjectModel(ArchiveBatch.name) private readonly batches: Model<ArchiveBatchDocument>,
+    private readonly cold: ColdStorageClient,
+    config: ConfigService,
+  ) {
+    this.retentionDays = Number(config.get('AUDIT_HOT_RETENTION_DAYS') ?? 90)
+    this.signingKey = config.getOrThrow<string>('AUDIT_SIGNING_KEY')
+    this.serverSideEncryption = config.get('AUDIT_COLD_SSE') === 'true' ? 'AES256' : undefined
+  }
+
+  // One archive run. Selects events older than the retention boundary, packs
+  // them, uploads, then deletes from hot Mongo. Returns a small result so
+  // the worker can log a meaningful line.
+  async runOnce(opts?: { override?: boolean }): Promise<ArchiveResult> {
+    // Cutoff: events with at < cutoff go cold. For dev/forced runs, the
+    // caller can override the retention check entirely (so we can exercise
+    // the path on minute-old events).
+    const cutoff = opts?.override
+      ? new Date()
+      : new Date(Date.now() - this.retentionDays * 24 * 60 * 60 * 1000)
+
+    // Pull the eligible events ordered by seq. Cap per run so a runaway
+    // backlog doesn't OOM us — at 100k events/batch the next run picks up
+    // where we left off.
+    const MAX_PER_BATCH = 100_000
+    const events = await this.events
+      .find({ chained: true, at: { $lt: cutoff } })
+      .sort({ seq: 1 })
+      .limit(MAX_PER_BATCH)
+      .lean()
+      .exec()
+
+    if (events.length === 0) {
+      return { ok: true, reason: 'no events older than cutoff' }
+    }
+
+    const startSeq = events[0].seq!
+    const endSeq = events[events.length - 1].seq!
+    const startedAt = new Date()
+
+    // Build JSONL — one event per line, no extra wrapping. Preserves the
+    // original document shape so offline tools can `jq` it directly.
+    const jsonlLines = events.map((e) => JSON.stringify(stripMongoMeta(e)))
+    const jsonl = jsonlLines.join('\n') + '\n'
+    const bytesUncompressed = Buffer.byteLength(jsonl, 'utf8')
+    const gzipped = gzipSync(Buffer.from(jsonl, 'utf8'))
+
+    // Hash the uncompressed payload — the manifest's hash is content-
+    // addressable so anyone redownloading + decompressing can re-verify.
+    const sha256 = createHash('sha256').update(jsonl).digest('hex')
+
+    const objectPrefix = objectKeyPrefix(startedAt, startSeq, endSeq)
+    const jsonlKey = `${objectPrefix}.jsonl.gz`
+    const manifestKey = `${objectPrefix}.manifest.json`
+
+    const firstEventHash = events[0].hash ?? '<missing>'
+    const lastEventHash = events[events.length - 1].hash ?? '<missing>'
+    const endedAt = new Date()
+
+    // Sign the manifest. Same key as Phase 3 checkpoints — an attacker who
+    // wants to forge an archive batch needs both S3 write AND this key.
+    const unsigned = {
+      version: 1 as const,
+      startSeq,
+      endSeq,
+      eventCount: events.length,
+      startedAt: startedAt.toISOString(),
+      endedAt: endedAt.toISOString(),
+      bytesUncompressed,
+      bytesCompressed: gzipped.length,
+      sha256,
+      firstEventHash,
+      lastEventHash,
+    }
+    const signature = createHmac('sha256', this.signingKey)
+      .update(JSON.stringify(unsigned))
+      .digest('hex')
+    const manifest: ArchiveManifest = {
+      ...unsigned,
+      signature,
+      sigAlg: 'HMAC-SHA-256',
+    }
+    const manifestJson = JSON.stringify(manifest, null, 2)
+    const manifestSha256 = createHash('sha256').update(manifestJson).digest('hex')
+
+    try {
+      await this.cold.put({
+        key: jsonlKey,
+        body: gzipped,
+        contentType: 'application/gzip',
+        serverSideEncryption: this.serverSideEncryption,
+      })
+      await this.cold.put({
+        key: manifestKey,
+        body: manifestJson,
+        contentType: 'application/json',
+        serverSideEncryption: this.serverSideEncryption,
+      })
+
+      // Confirm both objects landed before deleting from hot.
+      const [jsonlHead, manifestHead] = await Promise.all([
+        this.cold.head(jsonlKey),
+        this.cold.head(manifestKey),
+      ])
+      if (!jsonlHead.exists || !manifestHead.exists) {
+        throw new Error(
+          `archive HEAD failed: jsonl=${jsonlHead.exists} manifest=${manifestHead.exists}`,
+        )
+      }
+    } catch (err) {
+      this.logger.error(
+        `archive upload failed (seq ${startSeq}-${endSeq}): ${
+          err instanceof Error ? err.message : String(err)
+        } — events remain in hot Mongo`,
+      )
+      return {
+        ok: false,
+        reason: err instanceof Error ? err.message : String(err),
+        startSeq,
+        endSeq,
+        eventCount: events.length,
+      }
+    }
+
+    // Record the batch BEFORE the delete so a crash between the two leaves
+    // us with a batch record pointing at events that still exist in hot —
+    // safe. The reverse (delete-then-record) could orphan events.
+    const batch = await this.batches.create({
+      archivedAt: endedAt,
+      startSeq,
+      endSeq,
+      eventCount: events.length,
+      manifestSha256,
+      jsonlKey,
+      manifestKey,
+      bytesUncompressed,
+    })
+
+    // Delete from hot. One bulk op; safe because we own this seq range.
+    await this.events
+      .deleteMany({ chained: true, seq: { $gte: startSeq, $lte: endSeq } })
+      .exec()
+
+    this.logger.log(
+      `archive batch ${batch._id} · seq ${startSeq}-${endSeq} · ${events.length} events → ${jsonlKey}`,
+    )
+
+    return {
+      ok: true,
+      batchId: String(batch._id),
+      startSeq,
+      endSeq,
+      eventCount: events.length,
+    }
+  }
+
+  listBatches(limit = 100): Promise<ArchiveBatchDocument[]> {
+    return this.batches.find().sort({ archivedAt: -1 }).limit(limit).exec()
+  }
+
+  // Oldest chained event still in hot Mongo. Used by /audit/verify to report
+  // the tier boundary.
+  async oldestHotSeq(): Promise<number | null> {
+    const e = await this.events.findOne({ chained: true }, { seq: 1 }).sort({ seq: 1 }).exec()
+    return e?.seq ?? null
+  }
+
+  // Highest seq archived (across all batches).
+  async highestArchivedSeq(): Promise<number | null> {
+    const b = await this.batches.findOne().sort({ endSeq: -1 }).exec()
+    return b?.endSeq ?? null
+  }
+}
+
+// Removes Mongoose-internal keys we don't want in the cold JSONL.
+// _id stays (it's a useful retrieval handle for compliance lookups), but
+// __v and any virtual aliases are stripped.
+function stripMongoMeta(doc: Record<string, unknown>): Record<string, unknown> {
+  const out: Record<string, unknown> = {}
+  for (const [k, v] of Object.entries(doc)) {
+    if (k === '__v') continue
+    out[k] = v
+  }
+  return out
+}
+
+// S3 key layout: audit/YYYY/MM/DD/seq-{start}-{end}. Year/month/day buckets
+// keep S3 list responses manageable as years roll over.
+function objectKeyPrefix(at: Date, startSeq: number, endSeq: number): string {
+  const y = at.getUTCFullYear()
+  const m = String(at.getUTCMonth() + 1).padStart(2, '0')
+  const d = String(at.getUTCDate()).padStart(2, '0')
+  return `audit/${y}/${m}/${d}/seq-${startSeq}-${endSeq}`
+}
@@ -0,0 +1,78 @@
+// Daily-ish scheduler for the audit archive run. Disabled by default
+// (ARCHIVE_ENABLED=false) — production turns it on once volumes warrant.
+// The operator UI can force a run via POST /audit/archive/run regardless
+// of this flag.
+
+import {
+  Injectable,
+  Logger,
+  type OnApplicationBootstrap,
+  type OnModuleDestroy,
+} from '@nestjs/common'
+import { ConfigService } from '@nestjs/config'
+import { ArchiveService } from './archive.service.js'
+
+// One hour. Inside each tick we check if the current UTC hour matches the
+// configured run-hour; only one of 24 ticks per day actually invokes the
+// archive. Cheap and simple — no real cron lib needed.
+const TICK_MS = 60 * 60 * 1000
+const DEFAULT_RUN_HOUR_UTC = 3 // 03:00 UTC daily
+
+@Injectable()
+export class ArchiveWorker implements OnApplicationBootstrap, OnModuleDestroy {
+  private readonly logger = new Logger(ArchiveWorker.name)
+  private readonly enabled: boolean
+  private readonly runHour: number
+  private timer: NodeJS.Timeout | null = null
+  private lastRunDay: string | null = null
+
+  constructor(
+    private readonly archive: ArchiveService,
+    config: ConfigService,
+  ) {
+    this.enabled = config.get('ARCHIVE_ENABLED') === 'true'
+    this.runHour = Number(config.get('ARCHIVE_RUN_HOUR_UTC') ?? DEFAULT_RUN_HOUR_UTC)
+  }
+
+  onApplicationBootstrap(): void {
+    if (!this.enabled) {
+      this.logger.log(
+        'ARCHIVE_ENABLED=false — archive scheduler dormant. Operator UI can force runs.',
+      )
+      return
+    }
+    this.logger.log(`Archive scheduler active · runs daily at ${this.runHour}:00 UTC`)
+    // Fire once on startup in case we missed a window; the day-guard prevents
+    // double-runs within the same UTC day.
+    void this.tick()
+    this.timer = setInterval(() => void this.tick(), TICK_MS)
+  }
+
+  onModuleDestroy(): void {
+    if (this.timer) clearInterval(this.timer)
+  }
+
+  private async tick(): Promise<void> {
+    const now = new Date()
+    if (now.getUTCHours() !== this.runHour) return
+    const today = now.toISOString().slice(0, 10) // YYYY-MM-DD UTC
+    if (this.lastRunDay === today) return // already ran today
+    this.lastRunDay = today
+
+    this.logger.log(`Archive tick fired for ${today}`)
+    try {
+      const res = await this.archive.runOnce()
+      if (res.ok && res.eventCount) {
+        this.logger.log(`Archive complete: ${res.eventCount} events (${res.startSeq}-${res.endSeq})`)
+      } else if (res.ok) {
+        this.logger.log(`Archive complete: ${res.reason ?? 'no-op'}`)
+      } else {
+        this.logger.error(`Archive failed: ${res.reason}`)
+      }
+    } catch (err) {
+      this.logger.error(
+        `Archive tick crashed: ${err instanceof Error ? err.message : String(err)}`,
+      )
+    }
+  }
+}
@@ -0,0 +1,110 @@
+// Thin wrapper around @aws-sdk/client-s3 configured for Dezky's audit
+// archive bucket. Same code talks to MinIO in dev and Hetzner Object
+// Storage in prod — only the endpoint + credentials change via env.
+//
+// We deliberately keep the surface small (put, head, list) so the archive
+// worker doesn't depend on AWS SDK specifics that might shift between
+// versions. Streaming reads / restore-from-cold are a follow-up; today's
+// scope is the write path.
+
+import { Injectable, Logger } from '@nestjs/common'
+import { ConfigService } from '@nestjs/config'
+import {
+  HeadObjectCommand,
+  ListObjectsV2Command,
+  PutObjectCommand,
+  S3Client,
+} from '@aws-sdk/client-s3'
+
+export interface ColdPutInput {
+  key: string
+  body: Buffer | string
+  contentType?: string
+  // Server-side encryption for prod (Hetzner SSE-S3). MinIO ignores when
+  // unset; setting it explicitly is a no-op for dev but documents intent.
+  serverSideEncryption?: 'AES256'
+}
+
+export interface ColdHeadResult {
+  exists: boolean
+  size?: number
+  etag?: string
+}
+
+@Injectable()
+export class ColdStorageClient {
+  private readonly logger = new Logger(ColdStorageClient.name)
+  private readonly client: S3Client
+  private readonly bucket: string
+
+  constructor(config: ConfigService) {
+    const endpoint = config.getOrThrow<string>('AUDIT_COLD_ENDPOINT')
+    const region = config.get<string>('AUDIT_COLD_REGION') ?? 'us-east-1'
+    const accessKeyId = config.getOrThrow<string>('AUDIT_COLD_ACCESS_KEY')
+    const secretAccessKey = config.getOrThrow<string>('AUDIT_COLD_SECRET_KEY')
+    this.bucket = config.getOrThrow<string>('AUDIT_COLD_BUCKET')
+
+    this.client = new S3Client({
+      endpoint,
+      region,
+      credentials: { accessKeyId, secretAccessKey },
+      // forcePathStyle is mandatory for MinIO and harmless for Hetzner (which
+      // accepts both virtual-host + path-style). Without it the SDK tries
+      // `bucket.minio:9000` which doesn't resolve.
+      forcePathStyle: true,
+    })
+  }
+
+  get bucketName(): string {
+    return this.bucket
+  }
+
+  // Upload an object. Returns the ETag the server assigned. Throws on
+  // network/auth failure; callers should not catch and pretend success —
+  // the archive worker uses throw-on-failure to keep events in hot storage.
+  async put(input: ColdPutInput): Promise<{ etag?: string }> {
+    const res = await this.client.send(
+      new PutObjectCommand({
+        Bucket: this.bucket,
+        Key: input.key,
+        Body: input.body,
+        ContentType: input.contentType,
+        ServerSideEncryption: input.serverSideEncryption,
+      }),
+    )
+    return { etag: res.ETag }
+  }
+
+  // Existence + size check. The archive worker calls this after every put
+  // to confirm the upload actually landed before deleting from hot Mongo.
+  async head(key: string): Promise<ColdHeadResult> {
+    try {
+      const res = await this.client.send(
+        new HeadObjectCommand({ Bucket: this.bucket, Key: key }),
+      )
+      return { exists: true, size: res.ContentLength, etag: res.ETag }
+    } catch (err) {
+      // S3 returns 404 for missing keys; the SDK surfaces it as a NotFound
+      // error. Treat 404 as "doesn't exist" without logging — anything else
+      // is real failure.
+      const e = err as { name?: string; $metadata?: { httpStatusCode?: number } }
+      if (e?.name === 'NotFound' || e?.$metadata?.httpStatusCode === 404) {
+        return { exists: false }
+      }
+      throw err
+    }
+  }
+
+  // List objects under a prefix. Used by the operator UI to show recent
+  // archive batches. Paginated via continuation token; for the v1 UI we cap
+  // at a single page since we only show the latest N.
+  async list(prefix: string, max = 100): Promise<{ keys: string[]; truncated: boolean }> {
+    const res = await this.client.send(
+      new ListObjectsV2Command({ Bucket: this.bucket, Prefix: prefix, MaxKeys: max }),
+    )
+    return {
+      keys: (res.Contents ?? []).map((c) => c.Key!).filter(Boolean),
+      truncated: !!res.IsTruncated,
+    }
+  }
+}
@@ -0,0 +1,26 @@
+import { Module } from '@nestjs/common'
+import { MongooseModule } from '@nestjs/mongoose'
+import {
+  ArchiveBatch,
+  ArchiveBatchSchema,
+} from '../schemas/archive-batch.schema.js'
+import { AuditEvent, AuditEventSchema } from '../schemas/audit-event.schema.js'
+import { ArchiveService } from './archive.service.js'
+import { ArchiveWorker } from './archive.worker.js'
+import { ColdStorageClient } from './cold-storage.client.js'
+
+// Phase 4 — cold storage + retention. Owns the S3 client wrapper, the
+// archive service that moves events from hot Mongo to cold S3, and the
+// daily worker scheduler. AuditModule imports this and exposes archive
+// endpoints on /audit/archive*.
+@Module({
+  imports: [
+    MongooseModule.forFeature([
+      { name: AuditEvent.name, schema: AuditEventSchema },
+      { name: ArchiveBatch.name, schema: ArchiveBatchSchema },
+    ]),
+  ],
+  providers: [ColdStorageClient, ArchiveService, ArchiveWorker],
+  exports: [ArchiveService],
+})
+export class ColdModule {}
@@ -0,0 +1,50 @@
+import { Prop, Schema, SchemaFactory } from '@nestjs/mongoose'
+import { HydratedDocument } from 'mongoose'
+
+export type ArchiveBatchDocument = HydratedDocument<ArchiveBatch>
+
+// One row per successful archive run. Each row points at the S3 objects
+// (JSONL + manifest) and records the manifest's sha256 + signature so the
+// operator can verify cold-tier integrity without downloading the data.
+//
+// We keep these forever (negligible storage; one row per day at most). The
+// operator UI lists them with timestamps + seq ranges; offline tooling can
+// fetch the JSONL by `objectKey` for compliance retrieval.
+@Schema({ collection: 'archive_batches', timestamps: true })
+export class ArchiveBatch {
+  // ISO date of the archive run (when we moved data, not when the events
+  // happened). Used to bucket UI by day.
+  @Prop({ required: true, index: true })
+  archivedAt!: Date
+
+  // Inclusive seq range of events archived in this batch. The next batch
+  // starts at `endSeq + 1`.
+  @Prop({ required: true, index: true })
+  startSeq!: number
+
+  @Prop({ required: true })
+  endSeq!: number
+
+  @Prop({ required: true })
+  eventCount!: number
+
+  // sha256 of the manifest JSON (after signing). The full manifest is in S3;
+  // storing the hash here lets us detect manifest-level tampering without
+  // downloading anything.
+  @Prop({ required: true })
+  manifestSha256!: string
+
+  // S3 object keys (Bucket is global from ColdStorageClient).
+  @Prop({ required: true })
+  jsonlKey!: string
+
+  @Prop({ required: true })
+  manifestKey!: string
+
+  // Uncompressed event payload bytes (informational; the gzip'd object size
+  // lives in S3 metadata).
+  @Prop({ required: true })
+  bytesUncompressed!: number
+}
+
+export const ArchiveBatchSchema = SchemaFactory.createForClass(ArchiveBatch)